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Glossary


5-alpha-reductase inhibitors
A class of drugs, such as Finasteride or Dutasteride, that block conversion of testosterone into dihydrotestosterone, the major male sex hormone within the cells of the prostateA donut-shaped gland the size and shape of a walnut that surrounds the upper portion of the male urethra. Its main function is to produce part of the fluid that makes up semen..